21120+4000
- Unique Name: 21120+4000TDT2817
- RA: 21 11 57.66
- Dec: +39 59 47.3
- Discoverer: TDT
- Discoverer Number: 2817
- Components:
- First year: 1991
- Last year: 1991
- Observations: 1
- First position angle: 335
- Last position angle: 335
- First separation: 0.6
- Last separation: 0.6
- Mag first component: 11.34
- Mag second component: 11.73
- Spectral type:
- Primary proper motion RA: 0
- Primary proper motion DEC: 30
- Secondary proper motion RA: 0
- Secondary proper motion DEC: 30
- Durchmusterung:
- Notes: